Here we have described about WI-FI Module ESP8266 NodeMcu I/O Pins and controller.

1. http://aicra.ac.in
NODEMCU
An Open Source IOT Platform

2. NODEMCU | Overview
 The NodeMcu is an open-source firmware and development kit that helps you to Prototype your IOT product within
a few Lua script lines.
 Power:
 Input Voltage : 3.3V
 DC Current : 250mA
 Memory:
 RAM 32Kb
 DRAM 80Kb
 Flash 200Kb

3. NODEMCU | What is it?
 An Arduino-like device
 Main component: ESP8266
 With programmable pins
 And built-in wifi
 Power via USB
 Low cost
The NodeMCU (Node MicroController Unit) is an open source software and hardware development environment
that is built around a very inexpensive System-on-a-Chip (SoC) called the ESP8266.

4. NODEMCU | What you can do with it?
 Program it via C or LUA
 Access it via wifi (ex. HTTP)
 Connect pins to any device (in or out)

5. http://aicra.ac.in
NODEMCU | MAIN COMPONENT

6. http://aicra.ac.in
NODEMCU | PIN DESCRIPTION

7. http://aicra.ac.in
NODEMCU | ESP8266
 ESP8266 is a highly integrated chip designed for the needs of a new connected world.
 It offers a complete and self-contained Wi-Fi networking solution, allowing it to either host the application or to
offload all Wi-Fi networking functions from another application processor.
 ESP8266 has powerful on-board processing and storage capabilities that allow it to be integrated with the sensors
specific devices through its GPIOs with minimal development up-front and minimal loading during runtime.

8. http://aicra.ac.in
NODEMCU | ESP8266 PINOUT

9. NODEMCU | Features
 Open-source
 Interactive
 Programmable
 Low cost
 Simple
 Smart
 WI-FI enabled

10. http://aicra.ac.in
NODEMCU | Features
 I/O Pins:
 Digital Pins: Pin D0 – Pin D10 Digital Pins
 PWM Pins : 12 PWM Pins
 Analog Pins : Pin A0
 Power PINS
 Ground : 5 Pins
 3.3V : 3
 Vin Pin : 1 Adding external supply of +5V (is not connected to USB)

11. http://aicra.ac.in
NODEMCU | Specifications
The Development Kit based on ESP8266, integrates GPIO, PWM, IIC, 1-Wire and ADC all in one board. USB-TTL included, plug&play
 10 GPIO, every GPIO can be PWM, I2C, 1-wire
 USB-TTL included, plug & play
 PCB antenna

12. http://aicra.ac.in
NODEMCU | Getting started
 Install the Arduino IDE: https://www.Arduino.cc/en/Main/Software
 Install the ESP8266 Addon
 Go!

13. Sample code led blink
void setup()
{
// initialize digital pin 13 as an output.
pinMode(13, OUTPUT);
} // the loop function runs over and over again forever
void loop()
{
digitalWrite(13, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(13, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}